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CVE-2020-21883

28
FAUCET Score

CVE-2020-21883 is an OS command injection vulnerability found in the /tools/ping utility of Unibox U-50, UniBox Enterprise Series, and UniBox Campus Series 2.4 products. This flaw allows an authenticated attacker to achieve complete device takeover. With a CVSS score of 8.8 (High), it represents a significant risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2.4CPE matchmatch criteria
cpe:2.3:o:indionetworks:unibox_u50_firmware:2.4:*:*:*:*:*:*:*
2.4CPE matchmatch criteria
cpe:2.3:o:indionetworks:unibox_u500_firmware:2.4:*:*:*:*:*:*:*
2.4CPE matchmatch criteria
cpe:2.3:o:indionetworks:unibox_u1000_firmware:2.4:*:*:*:*:*:*:*
2.4CPE matchmatch criteria
cpe:2.3:o:indionetworks:unibox_u2500_firmware:2.4:*:*:*:*:*:*:*
2.4CPE matchmatch criteria
cpe:2.3:o:indionetworks:unibox_u5000_firmware:2.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.06%
Probability of exploitation in next 30 days
EPSS Percentile
89.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0406 is in the 89th percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

mail-archive.com / fulldisclosure%40seclists.org/msg07140.html
s3curityb3ast.github.io / KSA-Dev-009.txt
ExploitThird Party Advisory
mail-archive.com / [email protected]/msg07140.html